Ventilating device



Mme]? 1938- W. FLEMMING ET AL 2,112,524

VENTILATING DEVICE Filed April 16, 1 957 2 Sheets-Sheet 2 Patented Mar. 29, 1938 UNITEDISTATES PATENT OFFICE 2,112,524 VENTILATING DEVICE Application April 16, 1937, Serial No. 137,180

3 Claims.

This invention relates to ventilators of the class usually designated as turbine rotary ventilators, an object of the invention being to provide an improved ventilator of this class having weather protecting means to prevent the penetration of snow and rain into the room or structure to be ventilated.

A further object of the invention is the provision of a turbine rotary ventilator having one or more weather protecting baflle plates, bands or shields, each formed as the frustrum of a cone and located in such a position within the rotary ventilator that it will prevent the rain and snow passing between the blades of the ventilator penetrating the structure to be ventilated.

In the drawings accompanying and forming a part of this specification, Fig. 1 is a partly sectional view illustrating one form of the present improvement.

Fig. 2 is a similar view illustrating another form thereof, and v Fig. 3 is a similar view illustrating still another form thereof.

Similar characters of reference indicate corresponding parts in the several views.

Before explaining in detail the present improvement and mode of operation thereof, we desire to have it understood that the invention is not limited to the details of construction and arrangement of parts which are illustrated in the accompanying drawings since the invention is capable of other embodiments, and that the phraseology which we employ is for the purpose of description and not of limitation.

In the preferred form thereof herein illustrated, the ventilator comprises a cylindrical or pipe-formed base or neck 2 for attachment on the roof of the structure to be ventilated.

Secured to the outer side thereof are a plurality of supporting braces 3 terminating at the top in a plate 4 carrying a socket 5 for the reception of the upper end of a shaft 6, the lower end of which shaft is supported by a cross brace I having a hub 1' within the neck.

Supported by the shaft for rotation within the braces is a rotary turbine formed ventilator 8 comprising a series of spirally located flat blades 9 connected at their tops by a cap or top plate I!) having a hub II mounted on the shaft 6 and connected at their bottoms by a collar l2 having cross braces I3 through which the shaft projects. This collar is spaced from and surrounds the upper end of the neck 2 and rotates with the turbine therearound. Suitable ball bearings are provided for the shaft.

Weather protecting-means comprising a baflie plate in the form of an annular shield or band l4 formed as the frustrum of a cone is provided and in the form shown in Fig.- l, the lower end of the band is connected to the collar l2 preferably by interlocking it therewith as by flanging the lower end of the cone and clamping it in a channel-shaped portion l5 of the collar, the protecting band having its upper edge within the outer edge of the top or cap plate I0 whereby rain or snow penetrating the spaces between the blades of the turbine will be deflected downwardly and out at the lower ends of the spiral blades and, therefore, below the upper edge of the neck, thus preventing it from passing interiorly of the neck into the structure to be ventilated.

In the form shown in Fig. 2, the cone protecting band [4 is secured at its lower edge to the blades of the turbine and acts in a similar manner to accomplish the same result.

In the form shown in Fig. 3, the anti-friction bearings are carried by a tube l6 at the top and bottom thereof encircling the shaft and rotating thereon together with the turbine, the tube being secured to the top plate l0 and the cross braces l3 of the turbine.

Secured to the ring 12 and adjacent to the top plate ID are a plurality of supporting straps forming a tripod II, which tripod rotates with the turbine.

In this form of the invention, a pair of superposed protecting bands or shields I8 and I9, each in the form of the frustrum of a cone are shown, the lower band l8 having its lower edge encircling the lower ends of the braces and secured to the ring l2 while the upper band I9 is secured to the braces of the tripod l1 and projects beyond the upper edge of the lower band so that any rain or snow dropping from the upper band will be caught by the lowerband and led away from the interior of the ventilator.

In all forms of the improvement it will be observed that the cones are so located that the upper ends thereof, whether one or more be used, are within the outer edge of the cap plate Ill so that any rain or snow shed by the plate will be conveyed away from the interior of the cone and that these cones are also so located that the lower edges thereof are outside of the turbine collar and of the vertical plane of the neck so that these protecting bands or shields serve to prevent rain and snow that passes through the spaces between the spiral blades from entering the neck 2 by reason of the fact that such rain or snow is deflected outwardly to the bottoms of the blades where it will pass between the lower ends thereof and thus prevent any appreciable portion from passing through the neck into the structure to be ventilated.

It will be observed that by attaching the lower end of the cone frustrum at its widest point to the blades for rotation therewith as is done in Figs. 1 and 2 and in the lower cone frustrum of Fig. 3 that the water, snow, etc. will be carried downward and outward where it will be thrown by centrifugal force not only away from the neck but beyond the blades.

It is to be understood that, by describing in detail herein any particular form, structure or arrangement, it is not intended to limit the in-.

vention beyond the terms of the several claims or the requirements of the prior art.

Having thus explained the nature of our said invention and described a way of constructing and using the same, although without attempting to set forth all of the forms in which it may be made or all of the modes of its use, we claim:

1. A ventilator comprising a rotary turbine having an open lower end and formed of spaced blades, a shaft supporting it, and weather protecting means within said turbine and comprising the frustrum of a cone located with its base below its apex and attached adjacent to the blades for rotation therewith.

2. A ventilator comprising a rotary turbine having an open lower end and formed of spaced blades, a shaft supporting it, and weather protecting means within said turbine and comprising a plurality of superposed frustrums of cones located with their bases below their apices, the lower cone frustrum being attached adjacent to the blades for rotation therewith.

3. A ventilator comprising a rotary turbine having an open lower end and formed of spirally located spaced blades, a cap plate connecting said blades at the top, a collar connecting said blades at the'bottom, a shaft supporting said turbine, and weather protecting means within said turbine and comprising. the frustrum of a cone located with. its base below its apex and secured to the blades for rotation therewith between the top and bottom of the turbine.

. WALTER L. FLEMMING.

RUSSEL C. REICHART. 

